About GJ 504 b
GJ 504 b is an uncommon exoplanet. It lies about 57.2 light-years from Earth, has an equilibrium temperature near 510 K, spans roughly 12.11 Earth radii and weighs about 1,271.3 Earth masses.
About 12.1× the width of Earth.
Uncommon exoplanet 25 EP
GJ 504 b
RA 199.1923° · Dec 9.4250° · exoplanet
Score breakdown
· 3 badgesUncommon 33 pts → Rare
- Directly imaged +16
- Confirmed exoplanet +5
- Gas giant +4
Total score 25
8 more points to reach Rare.
Badges
- Confirmed exoplanet · +5
- Gas giant · +4
- Directly imaged · +16
Trivia
Could we get there?
- Verdict. Hopelessly far for any craft humanity can build today.
Getting there
- Aboard Voyager 1. ≈ 1 million years at Voyager 1's speed (17 km/s).
- Fastest probe ever. ≈ 89.3 thousand years even at the Parker Solar Probe's 192 km/s.
- At 10% light speed. ≈ 572 years in a starship at a tenth of light speed.
- Distance. 57.2 light-years from Earth.
Look-back time
- Look-back time. The light you'd see left around the year 1969.
Saying hello
- Say hello. A radio message and its reply would take 114 years round-trip.
By the numbers
- Size. About 12.1× the width of Earth.
- Volume. About 1774 Earths could fit inside it.
- Mass. Roughly 1271× Earth's mass — about 4 Jupiters.
- Your weight. You'd weigh about 8.7× your Earth weight standing here.
- Temperature. A scorching 237°C on average.
How we found it
- Discovery. Found by Subaru Telescope using the imaging method.
Properties
- density gcc
- 3.94
- discovery facility
- Subaru Telescope
- discovery method
- Imaging
- dist ly
- 57.1748
- eq temp k
- 510
- insolation
- 0.0011
- mass earth
- 1271.3
- name
- GJ 504 b
- radius earth
- 12.1057
- sys num planets
- 1
How to see it
Like any astronomical target, GJ 504 b is best seen from a dark site away from city lights, and when it is above the horizon depends on your latitude and the time of year. The visibility panel above works out tonight's viewing window for your saved location.
Why GJ 504 b is an uncommon exoplanet
GJ 504 b scores 25 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 8 points would lift it into a rarer tier.
That score comes from 3 science badges — Confirmed exoplanet, Gas giant and Directly imaged — each earned for a real, measurable property of the object. Rarity on Spacedle is never random: the more remarkable an object's astrophysics, the more badges it collects, the higher it scores, and the rarer it ranks.